SeaLevel SIO-485.LPCI User manual

Brand: SeaLevel

Model: SIO-485.LPCI

Category: Interface cards/adapters

Type: User manual

www.sealevel.com

PO Box 830 Liberty, SC 29657

864.843.4343

SIO-485.LPCI User Manual

Part Number 7107

SL9055 Revision 8/2015

SIO-485.LPCI User Manual

Table of Contents

INTRODUCTION 1

Other Sealevel Low Profile PCI Serial I/O Products 1

BEFORE YOU GET STARTED 2

What’s Included 2

Optional Items 2

SOFTWARE INSTALLATION 3

Windows 95/98/ME/NT/2000/XP 3

Linux 3

Party Software Support 3

PHYSICAL INSTALLATION 4

Physical Connection 4

CARD SETUP 5

Address and IRQ selection 5

Electrical Interface Selection 5

Line Termination 5

RS-485 ‘Echo’ 5

Clock Modes 5

RS-485 Enable Modes 7

ELECTRICAL CHARACTERISTICS 8

Specifications 8

APPENDIX A - TROUBLESHOOTING 9

APPENDIX B - HOW TO GET ASSISTANCE 10

APPENDIX C – ELECTRICAL INTERFACE 11

RS-422 11

RS-485 11

APPENDIX D - ASYNCHRONOUS COMMUNICATIONS 12

SL9055 Revision 8/2015

SIO-485.LPCI User Manual

APPENDIX E – SILK SCREEN – 7107 PCB 13

APPENDIX F - COMPLIANCE NOTICES 14

Federal Communications Commission Statement 14

WARRANTY 15

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SIO-485.LPCI User Manual

Introduction

The SIO-485.LPCI, Item Number 7107, is a low profile PCI module that provides a

single RS-422/485 serial interface port. The board is designed using the OX16C950

UART, which features a 128-byte FIFO and flexible clock prescalar (from 1 to

31.875), with support for 9-bit protocol and isochronous mode.

RS-422 provides excellent communications for long distance device connections up

to 4000ft., where noise immunity and high data integrity are essential.

RS-485 is optimized for ‘Multi-Drop’ or ‘Party-line’ operations selecting data from

multiple peripherals (as many as 31 devices can be connected on an RS-485 bus).

The SIO-485.LPCI is designed to be used with a variety of Operating Systems

including Windows 98/NT/ME/2000/XP, Linux and DOS. The SeaCOM API

(Application Programmer Interface) included on CD with the SIO-485.LPCI

provides a variety of useful high-level function calls implemented as a Windows

dynamic link library (DLL) and as a Linux kernel module and library. In addition to

the API, SeaCOM includes sample code and utilities to simplify software

development.

Other Sealevel Low Profile PCI Serial I/O Products

COMM+850.LPCI (P/N 7104) - 1-Port RS-232

Ultra 530.LPCI (P/N 7106) - 1-Port RS-232/422/485

Ultra COMM+I.LPCI (P/N 7108) - 1-Port Isolated RS-232/422/485

Ultra COMM+2.LPCI (P/N 7205) - 2-Port RS-232/422/485

COMM+4.LPCI (P/N 7406) - 4-Port RS-232

COMM+8.LPCI (P/N 7803) - 8-Port RS-232

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SIO-485.LPCI User Manual

Before You Get Started

What’s Included

The SIO-485.LPCI is shipped with the following items. If any of these items is

missing or damaged please contact Sealevel for replacement.

• SIO-485.LPCI Adapter

• 7107 includes low profile PCI bracket

• 7107S includes standard size PCI bracket

• Sealevel SeaCOM Software CD

Optional Items

Depending upon your application, you are likely to find one or more of the

following items useful for interfacing the SIO4-104.485. All items can be purchased

from our website (http://www.sealevel.com/) or by calling 864-843-4343.

• DB9 Female to RJ45 modular adapter (Item Number DB112)

The DB112 is pinned out for RS-485 signals and converts the 7107 DB9 Male

connector to an RJ45 connection. Designed for use with SeaI/O M-series

modules, it takes power from pin 9 on the 7107 and sends it out over any

standard RJ45 patch cable. This eliminates the need for an external power supply

when communicating with SeaI/O RS-485 devices.

• DB9 Male to DB9 Female Optomux adapter (Item Number DB103)

The DB103 is designed to convert a Sealevel DB9 Male connector to a pinout

compatible with AC24AT and AC422AT Opto-22 ISA bus cards. This allows

Optomux devices to be controlled from any Sealevel RS-422 board with a DB9

Male connector.

• DB9 Male to DB9 Male Sony SMPTE 207M cable (Item Number CA190)

This cable allows any Sealevel RS-422 adapter with a DB-9 to connect directly

to a Sony (or compatible) 207M 9-Pin connector.

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SIO-485.LPCI User Manual

Software Installation

Windows 95/98/ME/NT/2000/XP

Do not install the Adapter in the machine until the software has been fully

installed.

1. Start Windows.

2. Insert the Sealevel Systems CD in to your CD drive.

3. If ‘Auto-Start’ is enabled for this drive the software will automatically launch.

Otherwise, point your browser to the ‘Index.htm’ on the root directory of the CD

4. Select ‘Install Software’.

5. Select the Part Number for your adapter from the listing.

6. Select ‘Windows 98/ME/2000/XP’. The setup file will automatically detect the

operating environment and install the proper components. Next (depending on

the OS version) select the ‘Run this program from its current location’ or ‘Open’

option. Follow the information presented on the screens that follow.

7. A screen may appear with the declaration: “The publisher cannot be determined

due to the problems below: Authenticode signature not found.” Please select the

‘Yes’ button and proceed with the installation. This declaration simply means

that the Operating System is not aware of the driver being loaded. It will not

cause any harm to your system.

8. During setup the user may specify installation directories and other preferred

configurations. This program also adds entries to the system registry that are

necessary for specifying the operating parameters for each driver. An uninstall

option is also included to remove all registry/INI file entries from the system.

Linux

Refer to D:\software\seacom\Other\Linux\Linux.serial.readme (where D: = your

CDROM driver letter) found on the Sealevel Systems CD. This file contains valuable

information on installing your adapter in the various Linux releases. Also in this sub-

directory is the Linux SerialHOWTO. This series of files explains typical Linux

serial implementations, as well as informing the user to Linux syntax and preferred

practices.

Party Software Support

Third party software support for many HMI/MMI and other process control software

is included on the product installation CD. For the most up to date information on

third party software support, please visit

http://www.sealevel.com/thirdpartysoftware.asp.

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SIO-485.LPCI User Manual

Physical Installation

The adapter can be installed in any PCI expansion slot.

Do not install the Adapter in the machine until the software has been fully

installed.

1. Turn off PC power. Disconnect the power cord.

2. Remove the PC case cover.

3. Locate an available PCI slot and remove the blank metal slot cover.

4. Gently insert the PCI adapter into the slot. Make sure that the adapter is seated

properly.

5. Replace the screw. (This is required to ensure FCC Part 15 compliance.)

6. Replace the cover.

7. Connect the power cord

8. Installation is finished.

The SIO-485.LPCI is now ready for use.

Physical Connection

RS-422

Signal

Name

Pin #

Mode

GND

Ground

TX +

Transmit Data Positive

Output

TX-

Transmit Data Negative

Output

RX+

Receive Data Positive

Input

RX-

Receive Data Negative

Input

5V/12V

Power selected by E1

Output

RS-485

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SIO-485.LPCI User Manual

Signal

Name

Pin #

Mode

GND

Ground

DATA+

Data Positive

I/O

DATA-

Data Negative

I/O

5V/12V

Power selected by E1

Output

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SIO-485.LPCI User Manual

Card Setup

Address and IRQ selection

The SIO4-104.485 is automatically assigned I/O addresses and IRQs by your

motherboard BIOS. Only the I/O address may be modified by the user. Adding or

removing other hardware may change the assignment of I/O addresses and IRQs.

Electrical Interface Selection

The SIO-485.LPCI can be individually configured via SW1 as RS-422, or as a

two/four wire RS-485 interface. The following table illustrates the electrical modes

for SW1:

Electrical Mode

Switch Position 1

Switch Position 2

Switch Position 3

RS-422

Off

RS-485 4 Wire

Off

RS-485 2 Wire

Off

Line Termination

Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422

terminates at the receive end only). A 120-ohm resistor is across the RS-422/485 data

input in addition to a 1K-ohm pull-up/pull-down combination that biases the receiver

inputs. The 120-Ohm termination is ‘switched’ in or out by SW1 (silk screen position

‘T’). With the switch in the ‘On’ position, termination is present. With it in the ‘Off’

position termination is removed.

RS-485 ‘Echo’

The RS-485 ‘Echo’ is the result of connecting the receiver inputs to the transmitter

outputs. Every time a character is transmitted; it is also received. The SIO-485.LPCI

automatically suppresses this ‘Echo’.

Clock Modes

The SIO-485.LPCI utilizes a 14.7456 MHz oscillator. This is eight times faster than

the standard COM: port oscillator, which typically is 1.8432 MHz. This allows the

adapter to achieve a maximum data rate of 921.6Kbps. The following sections outline

the baud rate calculations and instructions for achieving your desired baud rate.

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SIO-485.LPCI User Manual

Baud Rates and Oscillator value

The following table shows some common data rates and the rates you should choose

to achieve them when using the SIO-485.LPCI. If the O/S of choice is Windows

95/98/ME/2000/NT/XP, the oscillator value (14.7456 MHz) should be entered into

the ‘Advanced Tab’ on 95/98/Me/2000/XP Device Manager applet. Typically this is

done automatically when the Sealevel Software driver is loaded.

When using Windows NT, the ‘Advanced Ports’ applet in the Control Panel should

be launched and the oscillator value entered manually in the ‘Advanced’ tab, or all

data rates will be eight (8) times the selected rate. For example if a data rate of

19.2Kbps is selected, the actual data rate will be 153.6Kbps.

When using any other OS (i.e. Linux) the following table should be used:

For this Data Rate

Choose this Data Rate

1200 bps

150 bps

2400 bps

300 bps

4800 bps

600 bps

9600 bps

1200 bps

19.2K bps

2400 bps

38.4K bps

4800 bps

57.6K bps

7200 bps

76.8K bps

9600 bps

115.2K bps

14.4K bps

153.6K bps

19.2K bps

230.4K bps

28.8K bps

460.8K bps

57.6K bps

921.6K bps

115.2K bps

If your communications package allows the use of baud rate divisors, choose

the appropriate divisor from the following table:

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SIO-485.LPCI User Manual

For this Data Rate

Choose this Divisor

1200 bps

768

2400 bps

384

4800 bps

192

9600 bps

19.2K bps

38.4K bps

57.6K bps

115.2K bps

230.4K bps

460.8K bps

921.6K bps

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SIO-485.LPCI User Manual

RS-485 Enable Modes

RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri-state

driver that will allow the electrical presence of the driver to be removed from the

line. The driver is in a tri-state or high impedance condition when this occurs. Only

one driver may be active at a time and the other driver(s) must be tri-stated.

This capability allows multiple PCs to be connected in a multi-drop bus and

selectively polled. Failure to correctly utilize the enable can cause transmitter

contention problems preventing operation by any node on the network. The SIO4-

104.485 utilizes the automatic RS-485 capabilities of the OX16C950 to control the

RS-485 tri-state enable. This is a highly efficient method of enable and allows for

minimum ‘turn-around’ times. If the Sealevel Systems Windows Software driver is

used, a ‘Radio’ style button on the ‘Advanced’ property page under the Device

manager can be selected that will configure the OX16C950 automatic RS-485 enable.

Another way of controlling the tri-state enable is with the output modem control

signal Request To Send (RTS). Some communication software packages refer to RS-

485 as RTS enable or RTS block mode transfer. The SIO4-104.485 is compatible

with this RS-485 mode as well. If the Sealevel Systems Windows Software driver is

used, a ‘Radio’ style button on the ‘Advanced’ property page under the Device

manager can be selected that will automatically toggle RTS for use as an enable.

Switch SW1 is used to control the RS-485 mode functions for the driver circuit. The

selections are:

‘RTS’ enable (silk-screen ‘R’) The ‘RTS’ mode uses the ‘RTS’ modem control

signal to enable the RS-485 interface and provides backward compatibility with

existing software products.

‘DTR’ enable (silk-screen ‘D’) The ‘DTR’ mode uses the ‘DTR’ modem control

signal to enable the RS-485 interface, provides backward compatibility with existing

software products and with the Oxford Semiconductor 16C950 RS-485 enable

feature.

Power Supply

The SIO-485.LPCI has the ability to provide DC power on pin 9 of the DB-9

connector to be used by the integrator in low power implementations. This power is

fused at 1A and is selectable as +5, +12 VDC or no power required.

+12 E1 +5

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SIO-485.LPCI User Manual

Electrical Characteristics

Specifications

RS-422/485 Transceiver

• Bidirectional Transceiver

• Meet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and

TIA/EIA-485-A and ITU Recommendations V.11 and X.27

• Designed for Multipoint Transmission on Long Bus Lines in Noisy

Environments

• 3-State Driver and Receiver Outputs

• Individual Driver and Receiver Enables

• Wide Positive and Negative Input/Output Bus Voltage Ranges

• Driver Output Capability . . . ±60 mA Max

• Thermal Shutdown Protection

• Driver Positive and Negative Current Limiting

• Receiver Input Impedance . . . 12 kΩ Min

• Receiver Input Sensitivity . . . ±200 mV

• Receiver Input Hysteresis . . . 50 mV Typ

• Operate From Single 5-V Supply

Temperature Range

• Operating: -0°C – 70°C

• Storage: -50°C – 105°C

Power Requirements

• +5VDC @ 400 mA

Physical Dimensions

• Length: 4.721 inches (11.99 cm)

• Height: 2.536 inches (6.44 cm)

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SIO-485.LPCI User Manual

Appendix A - Troubleshooting

Sealevel Software is supplied with the Sealevel Systems adapter and may be used in

the troubleshooting procedures. Using this software and following these simple steps

can eliminate most common problems without the need to call Technical Support.

1. Identify all I/O adapters currently installed in your system. This includes your

on-board serial ports, controller cards, sound cards etc. The I/O addresses used

by these adapters, as well as the IRQ (if any) should be identified.

2. Configure your Sealevel Systems adapter so that there is no conflict with

currently installed adapters. No two adapters can occupy the same I/O address.

3. Make sure the Sealevel Systems adapter is using a unique IRQ. While the

Sealevel Systems adapter does allow the sharing of IRQs, many other adapters

(i.e. SCSI adapters & on-board serial ports) do not. The IRQ is typically selected

by the BIOS or Operating system. Some BIOS setup software will allow

changing the IRQ, but others do not. Another method of changing assigned

resources is to try changing PCI slots. This will typically cause the BIOS or OS

to reassign the resources.

4. Make sure the Sealevel Systems adapter is securely installed in a motherboard

slot.

5. For Windows95/98/ME/NT/2000/XP, the diagnostic tool ‘WinSSD’ is installed

in the SeaCOM folder on the Start Menu during the setup process. First find the

ports using the Device Manager, then use ‘WinSSD’ to verify that the ports are

functional.

6. Remember that a loopback test is not possible in the RS-485 2-wire mode.

7. Always use the Sealevel Systems diagnostic software when troubleshooting a

problem. This will eliminate any software issues from the equation.

If these steps do not solve your problem, please call Sealevel Systems’ Technical

Support, (864) 843-4343. Our technical support is free and available from 8:00AM-

5PM Eastern Time Monday through Friday. For email support contact

mailto:support@sealevel.com.

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SIO-485.LPCI User Manual

Appendix B - How To Get Assistance

Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance

is still needed please see below.

When calling for technical assistance, please have your user manual and current

adapter settings. If possible, please have the adapter installed in a computer ready to

run diagnostics.

Sealevel Systems provides an FAQ section on its web site. Please refer to this to

answer many common questions. This section can be found at

http://www.sealevel.com/faq.asp

Sealevel Systems maintains a Home page on the Internet. Our home page address is

http://www.sealevel.com. The latest software updates, and newest manuals are

available via our FTP site that can be accessed from our home page.

Technical support is available Monday to Friday from 8:00 a.m. to 5:00 p.m. eastern

time. Technical support can be reached at (864) 843-4343.

RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL

SYSTEMS BEFORE RETURNED MERCHANDISE WILL BE ACCEPTED.

AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL

SYSTEMS AND REQUESTING A RETURN MERCHANDISE

AUTHORIZATION (RMA) NUMBER.

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SIO-485.LPCI User Manual

Appendix C – Electrical Interface

RS-422

The RS-422 specification defines the electrical characteristics of balanced voltage digital interface

circuits. RS-422 is a differential interface that defines voltage levels and driver/receiver electrical

specifications. On a differential interface, logic levels are defined by the difference in voltage between a

pair of outputs or inputs. In contrast, a single ended interface, for example RS-232, defines the logic

levels as the difference in voltage between a single signal and a common ground connection. Differential

interfaces are typically more immune to noise or voltage spikes that may occur on the communication

lines. Differential interfaces also have greater drive capabilities that allow for longer cable lengths. RS-

422 is rated up to 10 Megabits per second and can have cabling 4000 feet long. RS-422 also defines

driver and receiver electrical characteristics that will allow 1 driver and up to 32 receivers on the line at

once. RS-422 signal levels range from 0 to +5 volts. RS-422 does not define a physical connector.

RS-485

RS-485 is backwardly compatible with RS-422; however, it is optimized for party line or multi-drop

applications. The output of the RS-422/485 driver is capable of being Active (enabled) or Tri-State

(disabled). This capability allows multiple ports to be connected in a multi-drop bus and selectively

polled. RS-485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second. The

signal levels for RS-485 are the same as those defined by RS-422. RS-485 has electrical characteristics

that allow for 32 drivers and 32 receivers to be connected to one line. This interface is ideal for multi-drop

or network environments. RS-485 tri-state driver (not dual-state) will allow the electrical presence of the

driver to be removed from the line. Only one driver may be active at a time and the other driver(s) must

be tri-stated. RS-485 can be cabled in two ways, two wire and four wire mode. Two-wire mode does not

allow for full duplex communication, and requires that data be transferred in only one direction at a time.

For half-duplex operation, the two transmit pins should be connected to the two receive pins (Tx+ to Rx+

and Tx- to Rx-). Four wire mode allows full duplex data transfers. RS-485 does not define a connector

pin-out or a set of modem control signals. RS-485 does not define a physical connector.

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SIO-485.LPCI User Manual

Appendix D - Asynchronous Communications

Serial data communications implies that individual bits of a character are transmitted

consecutively to a receiver that assembles the bits back into a character. Data rate,

error checking, handshaking, and character framing (start/stop bits) are pre-defined

and must correspond at both the transmitting and receiving ends.

Asynchronous communications is the standard means of serial data communication

for PC compatibles and PS/2 computers. The original PC was equipped with a

communication or COM: port that was designed around an 8250 Universal

Asynchronous Receiver Transmitter (UART). This device allows asynchronous serial

data to be transferred through a simple and straightforward programming interface. A

starting bit followed by a pre-defined number of data bits (5, 6, 7, or 8) defines

character boundaries for asynchronous communications. The end of the character is

defined by the transmission of a pre-defined number of stop bits (usually 1, 1.5 or 2).

An extra bit used for error detection is often appended before the stop bits.

This special bit is called the parity bit. Parity is a simple method of determining if a

data bit has been lost or corrupted during transmission. There are several methods for

implementing a parity check to guard against data corruption. Common methods are

called (E)ven Parity or (O)dd Parity. Sometimes parity is not used to detect errors on

the data stream. This is refereed to as (N)o parity. Because each bit in asynchronous

communications is sent consecutively, it is easy to generalize asynchronous

communications by stating that each character is wrapped (framed) by pre-defined

bits to mark the beginning and end of the serial transmission of the character. The

data rate and communication parameters for asynchronous communications have to

be the same at both the transmitting and receiving ends. The communication

parameters are baud rate, parity, number of data bits per character, and stop bits (i.e.

9600, N, 8, 1).

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SIO-485.LPCI User Manual

Appendix E – Silk Screen – 7107 PCB

- 16 -

SIO-485.LPCI User Manual

Appendix F - Compliance Notices

Federal Communications Commission Statement

FCC - This equipment has been tested and found to comply with the limits for Class

A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference when the equipment is

operated in a commercial environment. This equipment generates, uses, and can

radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause harmful

interference in such case the user will be required to correct the interference at the

users expense.

EMC Directive Statement

Products bearing the CE Label fulfill the requirements of the EMC directive

(89/336/EEC) and of the low-voltage directive (73/23/EEC) issued by the European

Commission.

To obey these directives, the following European standards must be met:

EN55022 Class A - “Limits and methods of measurement of radio interference

characteristics of information technology equipment”

EN55024 – “Information technology equipment Immunity characteristics Limits and

methods of measurement”.

EN60950 (IEC950) - “Safety of information technology equipment, including

electrical business equipment”

Warning

This is a Class A Product. In a domestic environment, this product may cause

radio interference in which case the user may be required to take adequate

measures to prevent or correct the interference.

Always use cabling provided with this product if possible. If no cable is provided or

if an alternate cable is required, use high quality shielded cabling to maintain

compliance with FCC/EMC directives.

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SIO-485.LPCI User Manual

Warranty

Sealevel's commitment to providing the best I/O solutions is reflected in the

Lifetime Warranty that is standard on all Sealevel manufactured products. We are

able to offer this warranty due to our control of manufacturing quality and the

historically high reliability of our products in the field. Sealevel products are

designed and manufactured at its Liberty, South Carolina facility, allowing direct

control over product development, production, burn-in and testing.

Sealevel Systems, Inc. (hereafter "Sealevel") warrants that the Product shall conform

to and perform in accordance with published technical specifications and shall be

free of defects in materials and workmanship for life. In the event of failure,

Sealevel will repair or replace the product at Sealevel's sole discretion. Failures

resulting from misapplication or misuse of the Product, failure to adhere to any

specifications or instructions, or failure resulting from neglect or abuse are not

covered under this warranty.

Warranty service is obtained by delivering the Product to Sealevel and providing

proof of purchase. Return authorization must be obtained from Sealevel Systems

before returned merchandise will be accepted. Authorization is obtained by

calling Sealevel Systems and requesting a Return Merchandise Authorization

(RMA) number. The Customer agrees to insure the Product or assume the risk of

loss or damage in transit, to prepay shipping charges to Sealevel, and to use the

original shipping container or equivalent. Warranty is valid only for original

purchaser and is not transferable.

Sealevel Systems assumes no liability for any damages, lost profits, lost savings or

any other incidental or consequential damage resulting from the use, misuse of, or

inability to use this product. Sealevel Systems will not be liable for any claim made

by any other related party.

This warranty applies to Sealevel manufactured Product. Product purchased through

Sealevel but manufactured by a third party will retain the original manufacturer's

warranty.

Sealevel Systems, Inc.

2779 Greenville Highway

P.O. Box 830

Liberty, SC 29657 USA

(864) 843-4343 FAX: (864) 843-3067

www.sealevel.com

email: support@sealevel.com

Technical Support is available Monday - Friday from 8 a.m. to 5 p.m. Eastern time

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SeaLevel SIO-485.LPCI User manual

Brand: SeaLevel

Model: SIO-485.LPCI

Category: Interface cards/adapters

Type: User manual

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